Engine valve



J. H. GRUBE ENGINE VALVE Nov. 11, 1930.

Filed March 29, 1927 way,

Patented Nov. 11,1930

unrreo STATES JOHN H. GRUBE, or PASADENA, CALIFORNIA, Assrenioit roennian sI'LEn'r Morons INCORPORATED, or PHOENIX,{ARIZOI \TA, AooRroRArronoFAR zo A I meme Application fiI'e'tiMarch 29,

This invention particularly pertains to an engine valve of the slidevalve type for con trolling the'intake and'eihaust of fluidpressureoperated engines, such as steam engines,v compressed air enginesand more especially internal-combustionengines, object of thei'nv'entionis to provide an engineslide valve and amounting therefor soconstructed and arranged that pressure developed inthe engine cylinderwill act to maintain the valve against its seat-and whereby leakage ofgases from the "engine cylinder around the valve is inhibited.

Another object is to provide an engine valve of the above characterwithmeans for normally 'inaintainingthe valve in a properly seatedposition during the period when ga's'pressure the engine cylinder is notfunctioning to seat thevalve, and which will cooperate atother timeswith suchgas pressure in maintainingthe valveseatedyand which will alsoserve asa" constant take-up t'oconipensate for wear ofthecontactingsurface of thevalve-andjtsseat.

Another objectis to provide a connection between the slide valve and itsoperating mechanism which will permit the valve to accommodate itself toits seat atall times and whereby no forces willbe'iniposed upon thevalvefrom its operating mechanism that would tend to unseat-the valve. A r

Another object is toprovidea slide'valve' which is so constructed andarranged 'that when applied to'an internal combustion "en-Y gine anypitting or defacing of the surface of thelvalve or its mounting exposedtothe hot gases in the-engine cylinder rwill'not interferew'ith properfunctioning or seating Ofthev'alvep Another object is to provide'aslide'valve for internal combustion engines in which the A valve guidesare so arranged'that wearthereof will not permit ingress o f unwantedair' on the intake side of theiengine'and the egress of gases "on-theexhaust side and whereby accumulations of carbon will not be adetriin'ent'to' operation of 'thevalve I A further obj ect-is toprovidea slide valve mounting Y which will afford ready-access to thevalve without reinovingathe engine head;

vALv i With the foregoing objects in viewtogether with such otherobjects and advantagesas rnaylate'r appear, the'invention residesin thefeatures and in the parts, construction, p i

arrangement and combination of partshereinafter described and claimedand illustrated by way of example in the accompanying drawings in which:6 j

' "Fig. 1; is "a medial vertical 'section'of the slide valve with partsshown in elevation and i depictingit as applied'tothe cylinder-of aninternal coinbustion aengine and showing a preferred formof; valveoperating inechaa nisni; r l Fig. 2 is aydetailinxhorizo tal,seamen asseen on the; line 22of Fig.' 1I' Fig. 3;is' afdetai l in verticalsectionand' elevation as se'en'onthe line 3 -3 of"Fig."1. Fig. l isaview depicting 'almodified form of the valve Fig. 1. I

' Fig; 515F211 afurther Figlfigis asectional lview -showing theinventionas appliedto ;a double slide valve.

operating"mechanism shown elevational view illustrating Imodifiedfo'ifni of the valve operat ing-mechanlsm.

Referringto the drawings mo re specifi'cal 7 13, 15 indicates thesidewallof ane'ngine cylfinder which is formed adjacent its upper end with aport '6 constituting either an intake or an exhaust port.{ l

"In carrying out lily-invention the outer'fa'ce v I i of the wall 5 isformed with awall surface 7 that is preferably flat "and extending overthis surface is a valve housing 8 having an inner fiat face 9 which isspaced from the surface. 7

' and which forms a seat for a sl'ide valve 10 mounted for reciprocalmovement in the chamber 11 extending between the surfaces 7 andff); Thechamber 11 is'bounded :by a

wall '12 extending between the surfaces 7 and 9' which wall ispreferably formed on "the; engine cylinder wall 5, as shown but whichmay be formed Onthe housing '8 orgin any other desired-manner. The slidevalve 10 is formed of a thickness slightly less'thanthe' distancebetweenthewall surfaces 7 andI9-so that when the valveis seatedon the surface gi' aclearance will be aiforde'dbetween the inner '10 r face/ ot thevalve and the surface 1O ia sdnfdi cated at A which clearance issufficient to permit extreme expansion of 'the val ve and: its enclosingWalls Without bringing the inner face l i of thevalveinto' frictionalcontact With the surface 7 thus obviating any possipansion; I This'arrangement also SGIYfiS to negative any possibility ofthefunctionin'g'or to permit 'lateral' exp ansionl thereof and I ofTHQ-Qham e 1. ex nd above nd below he port ;6' and tjo ieach side.thereof,-= and v also' j'exl tends beyond the 'endSE 'ot [the Waive atthe linfits'of its stroke so'as to aiford carbon're 20 "ceiv'ingchambers and-1i; 1

' the-outeriend -of which'communicates either;

1 with; an intake IQr'I exhaust z anir a pt nee; I essary to be hereshown; and the innerendiof which op'ens-tothe chamber 11 through theValve seating siirface, '9 directly oppo'sitefthe port 61in the enginecylinder-"wall; 1The-valve v andlpassage when the yalve; isdisposedinthe position shown-'inidottedlines-in Rig, 1, which:gcoihmunication isclosed-jby the alve when the latter isfposi'tioneditodispose port 3 I15as sh oWn jin 1111 lines in Fig.1..

a" Thehousing sierormea fa slot a steinf 18 which passes throughi theslot '17 I andconnec'ts with ae sliitabl'e valve operating niechanisnfiindicated a generally-at F vin Figs.

4;,andg5 respectivelyg-The stem 18 is prefer;

I I ball andisoeketi'j ointf I, is here shown rse/1m bodyin'g a ballelenient 21 on'the v'alve which projects intel'aso'cket22 formed onthe inner I endyfofi the stern; I8. ,To providethe'ball and socketco'nnection the stem '17 is here shown, as 5 formed of "an open i/IldQCLtube the inner end of Whichisturned inwardlyover the-ball.

I 21 and ithe gballgisisforniedZ'With alt-breaded v v I V shank 23 forscrew 'engagementwith the Valve of the; tiibnlaij "stein 'giv'hereb'yj'thet 'threaded mentiwiththeflalv I r'theion'rvhieh sleeve isqforniedaashoul f a der i25'l; arranged toiseat on thejside marginsi i if 1 rthegslot; 1;7V=2toF-1imit:. inward movement, :o ff the; si'e Iecessionthefout r e d d bility of'binding ofthe valve dueltoi'such ex-V.

' proper seating ofthe valvebe'ing interfered ,I ;With-' byreas ii ofpittingjof ther valv su'rsface l4; exposed'to the interiorotthe engine lcylinder throughthe" port 6-.3 Clearances and Careflprovided at the.sides of the valve the WEI-118112 without binding off theiva-lvel' l 1 Qis i0rn ed with a,-port 16 extending trans j jlersely therethroughwhichportis adapted 2 to form a.; ,co1n n1 1nicatiolr'between the port 6 '16ou'tefiiregisterWithflth port;GTE ind passage 1-7 and connectingWith'thG oiit'er rfacefofrthe valve' is. I

' i l gand '3 and; designated-jet Grand i l Figs.-

and is zproy ided enxits outer face with toolreceii'ringrsloti2i{adaptedto'be engaged by screw; driverinsertedfthroiigh itheiout'er lend ishan'k '23-iina y be screwed in orout of engage. I I I I As1eeye251is1noiinted on ftihe stemffl8forqlongitlldi-nallmovement 'fected in rthe'li i'silal manne ,andcooligi h valve and l-ubricatifon th'ereof; nayz abe 3 at colnplishe'dinanapproved-manner;

Jvalveaseat von the sidef thereoi eye lltelativelyjto the, stein,-and;bearing der pitting? fofthe bearing kfac bears against a collar 27having screw engage- -eiipansi1e 26, the outerend oi'which" the tensionof the spring. Thespring 26 thus 'exertsan outward thrust on theste1n18to h V normally maintain the slide valve in'a seated 7' 1 position onthesurface9 of the Valve housing,- and aiso serves a continuousautomatic take' iip :to compensate {for 1 Wear of thecon tacting"surfaces-between the -valve and the I seat. v lhefball andsocketconnection I be-' II tween-the. stern and 'V'alve serves'to'prevent iany l'ateral forces imposed on the. stem 3 18 i I so t preve thW ref o e om g 'seatedf-{ by reason] {of $1 611 forces; {The valve may ibe reciprocate in; any; desired mannerl t'o move the'port lfltherei'n inand out i' ter with p rt tandi g l5 abein here shown in Fig; Laseflectedby; meansf -of V I I a Gain 28 on a tiining shaftQQ whichactliatesa ifstem 30;.connecting with the sleevei25l;-ithe f. P s m BQ i g fi d-Wi e1l Qr-3l; whi

seatsj-onthe cani andibeingproyided with an j expansile spring32arranged to yieldabl-y op; pose movement of the stem and; Valve j nderthe urge of. the cam and operableto InoY e the; i stem towardfthe. cam;the construction 'sho w l F g- 11 the am m 'vs heva re to from 'beingtransmitted "to the alve so as grooye 33 ionja can}, 345 'Whereby. onrotationof the cam :thes'temand Valve will bereci'prio-i nec entriq- 50,r m; wtlmm nmotat gi han 4 I str ap A5 5 carri ed by the sleeve 25 whichconfj istr c on e ard z po fii s recipr' c l move;- i'inent of the-Valize in both directions; 1 In this construction thei'sleeve'-v 25isgin thefoi j 10f a slide block. h'avin-g parallel sideifaces-wh ich 'n.-s1idab1e;. contactqi 1" project 'into 1 the-slot a d V P si y. in 99i' efi ib si, 1. 5 is. ns a ls-e hespringww on y s vetoi i ne taintheirolljer 31 against therinnen u or the i Q cam groove. LI forn zofvalyeoperating mech nism s nim F g- 1 3l- -on the valve sten 3Q'isiengaged inie-ceni ice V -io st f in) V with rthep'arallelgsideallsfot the latter so -as:

ag nst, turning On th i ention' i ap en from {the foregoing, eiti b eingse n th tpn 1 I I I tation O' f'the timing shaft the s'lidefy i will 4bejreciprocated through the medi'um -of i the instrumentalitiesactuated; from :the' tim ing shaft; Prop r timingoflthe yal'veli's 53f.3 It will observed thatebytarranging port; communicating witl'lfi-thradica ly;prevented; 1

valve 47 against the seat 9" inthe manner be- 43 housing wall 9.

agvsigi ve of carbon may accumulate therein,.in event such depositsshould occur without impeding movement of the valve for a considerablelength of time. In event such deposits should I occur excessively thecarbon may be readily removed by detachingthe housing 8 from the enginecylinder. It is to be noticed that reciprocation of the valve on itsseating surface under pressure of the engine gases and the urge of thespring 26 cleaning of this surface will be accomplished.-

The invention is applicable to engine valves of the double slide valvetype as shown in Fig. 6 in which embodiment a pair of slide valves 46and 47 are; arranged to seat against each other withthe innermost valve46 spaced from the outer surface 7 of the engine cylinder and with theouter valve 47 seating on the A] stem '18 on the inner valve 46 extendsthrough a slot 48 in the valve 47 which stem together with a stem 50 onthe valve 47 extends through a slot on the valve housing and areconnected with suitable operatingmeans, the stems being fittedwith'spring means for normally maintaining the valve 46 against valve 47and the fore described with reference to the singlevalve construction. vp I An important feature of the invention resides in the arrangementwhereby'the slide valve by reason of extending over the housing slot 17,which serves as a guide-way for the stem and valve, will afford a meansfor preventing leakage through the valve stem guide to or from theengine cylinder in event of wear of the guide elements; the slide valvebeing dimensioned to extend over and close the housing slot 17' at alltimes.

While I have shown and described a specific embodiment of my invention,I do not limit myself to the exact details of construction andarrangement shown, but may employ such modifications, equivalents, andchanges in construction and arrangement as come within the meaning andscope of the appended claims. 1 I

Iclaim; I

1. In an engine valve construction, a valve housing embodying acha-mberin open communication with an engine cyl nder, a slide.

valve in said chamber seating on a surface on the side thereof oppositesaid communlcation ar "the cthier si e crane H exposed throughout to thegz'y lin'jc le'rthrougl'i'said comrn'unication" and arranged sothatpressures developed gi'n' the engine cylinder wfl'rbeim posed oat-hevalve throughout the inner face val ve, and means for eflectingreciprocation of the valve connecting therewith through a slot coveredat all times by said valve.

'75 2. In combination with an engine cylin-v der wall having a port, aslide valve operable to cover anduncover saidport arranged exteriorlyof'said cylinder and spaced from said wall, and a valve housing coveringsaid slide valve on which the outer face of said valve seats throughoutthe travel of said valve.

3. In combination with an engine cylin-- der wall having a port, a slidevalve operable to cover and uncover said port arranged exteriorly ofsaid cylinder and spaced from said wall, a valvehousing cover ng saidslide valvejon which the outer face of said valve seats, andspring meansexerting a pull on said valve from the exterior thereof cooperating withgas pressures in the englne cylinder for'maintaining. the valve againstits seat throughout thetravel of said valve.

4. In combination with] an engine cylinder wall having a port, a housinghaving a flat face spaced from the external faceof the cylinder wallaround said port forming a valve chamber, a reciprocating slide valveinsaid chamber seating on said flat face and spaced from the cylinder wallwhereby gas said valve against saidface, a' stem on said 1'00 pressurein the engine cylinder 'Wi'll pressl valve projecting through saidhousing,"and a spring exerting an OlltWflIdtlflIllSt 'on' said stemcooperating with the gas pressure in maintaining the valve on its seatthroughout the travel of said valve.

5. The combination with an engine der embodying a wall having a port, ahousing having a'flat face spacedfrom thelexternal face of the cylinderwall a-round said port forming a valve chamber, a reciprocating slidevalve in saidch'amber seating on said flat face and spaced'f'rom thecylinder wall whereby gas pressure in the engine" cylinder will presssaid valve against said face, a stem on said valve proj ecting throughsaid on said stem cooperating with the, gas preshousing, a springexerting an outward thrust r 12 i sure in maintaining the valve on itsseat, and 4 V a flexible connection between said stem and valve. I I 16. In combination. with an engine cylinder wallhaving a 'port', aslidevalve operableto cover and uncover said port arranged exteriorly ofsaid cylinder and spaced .fromsaid wall, a housing extending over saidvalveagainst whichthe valve sli'dably seats, atubu- 1.

lar stem extending through a slotin said g 70 thereof and thereby-act topr ess the val e againstits seat throughout the travel ofsaid

